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The 10 Biggest Data Breaches Of 2021 (So Far)

More than 98.2 million individuals were impacted by the 10 biggest data breaches in the first half of 2021, with three of the 10 largest breaches occurring at technology companies.

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1. Astoria Company

Number Of Individuals Impacted: 30 Million

Night Lion Security’s threat intelligence team became aware in January of several new breached databases being sold on the dark web by hacking group Shiny Hunters, including 40 million U.S. Social Security numbers belonging to the Astoria Company (these numbers were inflated). Night Lion reported the problem to Astoria, who was unaware their data had been listed for sale on a dark web marketplace.

Night Lion’s analysis of the data found that 10 million Astoria customers had their Social Security numbers, bank accounts, and drivers license numbers exposed. In addition, more than 10 million Astoria customers had information from other fields exposed in the breach such as credit history, medical data, home, and vehicle information.

The leaked Astoria data also contained email transaction logs showing sensitive user information being transferred, unencrypted, via email, according to Night Lion. The thousands of emails contained in this log file included similar sensitive information sent to a number of different domains, Night Lion said.

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